On party discipline and parliamentary privilege: Should backbenchers be allowed to speak?

The Globe and Mail reports:

Mark Warawa, the Tory MP who represents the B.C. riding of Langley, has asked Speaker Andrew Scheer to find that his parliamentary privilege was breached when the party refused to allow him to talk about his private member’s motion condemning sex-selective abortions.

Mr. Harper has made it clear he does not want the issue of abortion to be raised, and Gordon O’Connor, the government whip, says it is the party’s right to draw up the list of its caucus members who will be permitted to speak.

What do you think: Should backbenchers be allowed to speak in the House of Commons, even when they are raising issues that their party leadership does not want to see raised?

Choices

No, a political party has the right to enforce discipline on their MPs.

Yes, it's a fundamental tenet of our parliamentary democracy.

Yes, but in this case it's good that the Conservatives prevented MP Warawa from raising this.